[0xCMP]

This is super cool. Was there any announcement or documentation for this?

We used a Cisco Meraki router once for a client and rigged it up to know who was in the office (for fun, to be aware that it could be done). It'd be nice to know the iPhone/iPad scramble themselves if possible.

[ghostly_s]

Apple made this change in 2014, it was widely reported. [1] Apparently it exists on Android now also, though I don't follow that platform closely.

1. https://arstechnica.com/apple/2014/06/ios8-to-stymie-tracker...

[dylz]

Android does the same thing, both announced a while ago